You also need to check the value of error. Here is a piece of code I use
that is very reliable. It uses NetLibReceive, but its the same principal.
I don't know if you are using blocking or non-blocking sockets, but this
will work for either.
UInt16 chunkSize = 512;
do {
// Loop until all data is received
result = NetLibReceive(netInfo.netLibRefnum, netInfo.netSocketRef, rcvP,
chunkSize, 0, NULL, 0, netInfo.netTimeout, &err);
// Non-blocking errors, pause a quarter second then continue
if (err == netErrWouldBlock || err == netErrSocketBusy) {
SysTaskDelay (SysTicksPerSecond() / 4);
err = 0;
result = 1;
} else {
if (result != -1 && !err) {
bytesReceived += result;
rcvP += result;
}
}
} while (result && result != -1 && !err);
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